聚邻甲基丙烯酰胺基苯甲酸/纳米ZnO复合物的制备及其荧光性能研究

利用原子转移自由基聚合(ATRP)法对合成的新单体邻甲基丙烯酰胺基苯甲酸(o-MAABA)进行聚合,通过核磁验证得到符合预先设计的、结构明确的聚合物,聚合物分子量为7900;将纳米ZnO引入到该聚合物P(o-MAABA)中,得到聚合物/纳米ZnO粒子复合物.用红外光谱和差热分析方法对聚合物和复合物进行了表征,并采用透射电镜(TEM)观察了复合物粒子的形貌.红外光谱表明纳米ZnO确实被引入到聚合物链中,并且与聚合物中的某些官能团发生了一定的相互作用;差热分析表明P(o-MAABA)/纳米ZnO复合物的热稳定性较原来聚合物P(o-MAABA)有所提高;TEM观察表明复合物粒子基本为球状,表面较为光滑.P(o-MAABA)/纳米ZnO复合物表现出特殊的荧光性能,与聚合物相比荧光光谱发生红移,并且复合物溶解性较好,能成膜,可望在发光材料方面得到应用.

Preparation of Composite of Poly (o-Methyl-Acrylamide-Benzoic Acid)/ZnO Nanoparticles and Its Property of Fluorescence

The preparation of P(o-MAABA) via ATRP and the composite of P(o-MAABA)/ZnO nanoparticles were described.()~1H NMR,IR,TA and TEM were utilized to confirm the results.()~1H NMR indicates that the structure of the P(o-MAABA) was definite,and the molecule weight of P(o-MAABA) was 7 900.IR shows that ZnO nanoparticles were introduced to P(o-MAABA) and were interacted with the reactive groups of polymer.TA shows that the heat stability of P(o-MAABA))/ZnO composite increased greatly.TEM photo demonstrates that the composite was spherical and the surface was smooth.The P(o-MAABA)/ZnO composite exhibits particular fluorescence property,and the emission spectrum of the P(o-MAABA)/ZnO composite red shifts 25 nm compared to the polymer.In addition,the composite features good solubility and film formability,and may become a new optical material.